1968 Camaro (projekt 1sickT8)

[TheBandit]

Okay, so you did the G-mod and upon realignment, only adjusted camber and toe? That may explain what you're seeing. Even if holes aren't shifted rearward, when they move down the upper arm is at a steeper angle and due to the inclination of control arm shaft, there is caster gain (the balljoint swings up & backwards as the UCA travels upward). Your new alignment probably has more caster than your previous alignment. I'm not sure how much exactly - worth measuring for sure and I'll bet that is where your bump steer change is coming from.